Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Viscosity
Patent
1988-06-17
1989-11-28
Levy, Stewart J.
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Viscosity
G01N 1104
Patent
active
048829307
ABSTRACT:
A melt indexer system for determining the melt index of a plastic by testing. The melt indexer system comprises a plurality of melt indexers, each of the melt indexers including a melt chamber into which a sample of plastic to be tested is placed, a heater for melting the sample to a predetermined temperature and a test piston for extruding the melted sample through a calibrated orifice of a removable die to determine the viscosity of the sample as a function of its temperature. A robot arm and a computer programmable to control the movement of the robot arm are provided. An infeed queue holds in predetermined order a plurality of containers containing samples to be tested and a bar code reader identifies each sample to be tested. A test computer associates a particular sample with a predetermined plan for testing the sample, records and processes the melt index test results. A vacuum sipper extracts a charge of the sample from the sample container and places it in the melt chamber. A cleaning tool cleans the test piston and melt chamber after the test is complete and prepares the apparatus for the next test.
REFERENCES:
patent: 3203225 (1965-08-01), Sieglaff et al.
patent: 3625050 (1971-12-01), Noetzel et al.
patent: 3758776 (1973-09-01), Frohne et al.
patent: 4096739 (1978-06-01), Barker et al.
Akeson Richard C.
Ding Gustav L. P.
Jackson Jared K.
Malsch Harry K.
Nagy Gabor S.
Adams, III W. Thad
Automatik Machinery Corporation
Levy Stewart J.
Roskos Joseph W.
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